Circuit Diagrams; Smps - Power Circuit Diagram - LG SB95TX-S Service Manual

CIRCUIT DIAGRAMS

1. SMPS - POWER CIRCUIT DIAGRAM

No Power
F901 is Defective
12
11
10
9 No Power
Q901 is Defective
8
Switching Error
IC901 is Defective
7
6
5
4
CAUTION:
Danger if fuse is incorrectly replaced.
Replace only with the type identical to fuse rating
3
and(or) model name described in main label.
2
Warning
Parts that are shaded are critical with
respect to risk of fire or electrical shock.
1
A B C D
No Power
R920 is Defective
No Power
D910 is Defective
No Power
IC902 is Defective
E F G H I
2-91
IMPORTANT SAFETY NOTICE
WHEN SERVICING THIS CHASSIS, UNDER NO
CIRCUMSTANCES SHOULD THE ORIGINAL DESIGN
BE MODIFIED OR ALTERED WITH OUT PERMISSION
FROM THE LG CORPORATION. ALL COMPONENTS
SHOULD BE REPLACED ONLY WITH TYPES
IDENTICAL TO THOSE IN THE ORIGINAL CIRCUIT.
No Power
BD901 is Defective
Amp No Power
D951,D953 are Defective
No Power
D907,D906 are Defective
VKK,FL,12V,5.6V No Power
IC961 is Defective
Switching Error
PC971, IC971 are Defective
J K L M
2-92
SPECIAL COMPONENTS ARE SHADED ON THE NOTE :
SCHEMATIC FOR EASY IDENTIFICATION. 1. Shaded( ) parts are critical for safety. Replace only
THIS CIRCUIT DIAGRAM MAY OCCASIONALLY with specified part number.
DIFFER FROM THE ACTUAL CIRCUIT USED. THIS 2. Voltages are DC-measured with a digital voltmeter
WAY, IMPLEMENTATION OF THE LATEST SAFETY during Play mode.
AND PERFORMANCE IMPROVEMENT CHANGES
INTO THE SET IS NOT DELAYED UNTIL THE NEW
SERVICE LITERATURE IS PRINTED.
Switching Error
PC951 is Defective
FL No Power VKK No Power 12V No Power
D964 is Defective D963 is Defective D962 is Defective
5.6V No Power
D961 is Defective
N O P Q R S T